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1. WO2020115219 - AEROSOL-GENERATING ARTICLE HAVING BIODEGRADABLE FILTRATION MATERIAL

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[ EN ]

CLAIMS

1 . An aerosol-generating article comprising:

an aerosol-generating substrate;

a filter in axial alignment with the aerosol-generating substrate, the filter comprising at least one segment of filtration material formed of one or more sheets of a fibrous paper-like material, wherein the fibrous paper-like material comprises a combination of hydrophobic fibres and hydrophilic fibres such that the fibrous paper-like material has a water contact angle as measured in accordance with TAPPI/ANSI T 558 om-15 greater than 90 degrees and wherein the fibrous paper- 1 ike material has a biodegradability in aqueous medium as tested in accordance with ISO 14851 (2005) of at least 70 percent of the degradation of a cellulose reference within 56 days of testing, wherein the hydrophobic fibres comprise hydrophobic viscose fibres.

2. An aerosol-generating article according to claim 1 wherein the fibrous paper-like material has a water contact angle as measured in accordance with TAPPI/ANSI T 558 om-15 of between 95 degrees and 105 degrees.

3. An aerosol-generating article according to claim 1 or 2 wherein the fibrous paper-like material has a biodegradability in aqueous medium as tested in accordance with ISO 14851 (2005) of at least 90 percent of the degradation of a cellulose reference within 56 days of testing.

4. An aerosol-generating article according to any preceding claim wherein the water absorbency of the fibrous paper- 1 ike material is greater than 180 seconds.

5. An aerosol-generating article according to any preceding claim wherein the hydrophilic fibres and the hydrophobic fibres represent at least 50 percent of weight of the dry matter of the fibrous paper-like material.

6. An aerosol-generating article according to any preceding claim wherein the ratio of hydrophobic fibres to hydrophilic fibres is between 2:3 and 3:2, or 2:1 and 1 :2.

7. An aerosol-generating article according to claim 6 wherein the ratio of hydrophobic fibres to hydrophilic fibres in the fibrous paper-like material is about 1 :1 .

8. An aerosol-generating article according to any preceding claim wherein the hydrophilic fibres comprise plant fibres, softwood fibres, or cellulose fibres.

9. An aerosol-generating article according to any preceding claim wherein the fibrous paper like material has a basis weight of at least 25 grams per square metre.

10. An aerosol-generating article according to any preceding claim wherein the segment of filtration material is formed of one or more gathered sheets of the fibrous paper-like material.

1 1. An aerosol-generating article according to any preceding claim wherein the one or more sheets of the fibrous paper-like material are crimped.

12. An aerosol-generating article according to any preceding claim wherein the fibrous paper like material comprises a binding agent selected from the group consisting of polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), polyvinyl acetate (PVA), polyethylene, polypropylene, polyester, cellulose acetate, cellulose ester, alkyl succinic anhydride, a rosin, an acrylic copolymer, a modified starch, an hydrocolloid, and mixtures thereof.

13. A filter segment for use in an aerosol-generating article comprising a filtration material circumscribed by a wrapper, the filtration material comprising a sheet of fibrous paper-like material, wherein the fibrous paper-like material comprises a combination of hydrophobic fibres and hydrophilic fibres, wherein the fibrous paper-like material has a water contact angle greater than 90 degrees angle as measured in accordance with TAPPI/ANSI T 558 om-15 and a biodegradability in aqueous medium as tested in accordance with ISO 14851 (2005) of at least 70 percent of the degradation of a cellulose reference within 56 days of testing, wherein the hydrophobic fibres comprise hydrophobic viscose fibres.